My interest in guitar pickups had some of my builds looking a bit like things from the tpu videos. In particular the garage version made from aluminum speaker type rings and small ferrite xformers linking the upper and lower pickup(ring) at 180 deg. This link is from a group of dedicated and practical individuals with passion for creativity and music. https://music-electronics-forum.com/forum/instrumentation/pickup-makers/5622-low-impedance-pickup-research?t=5447Low impedance magnetic manipulation ..magnets and small inductors to transform impedance . Its a great read if you have any interest in stringed instruments . But if we consider eddy currents in the pickup loops , there seems to be some unexploited experimental possibilities. I recommend reading the whole thread following whatever links still work and making a pickup or 2 (connected to an amp) and see if they can be made to interact with each other. There are a few interesting reactions ...no claims just another area where passive interactions with magnet placement using minimal test equipment can be explored. It surely can change your thinking about guitar pickups .
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